Polarized eyewear with selective blocking

Patent metadata

Field	Value
Publication number	US-11561417-B2
Application number	US-201816954425-A
Country	US
Kind code	B2
Filing date	Dec 13, 2018
Priority date	Dec 20, 2017
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

Provided herein is an improved polarized eyewear with selective light wavelength blocking and a method of making such polarized eyewear.

First claim

The invention claimed is:

1. An optical article comprising:
at least a first polarizing filter comprising at least one dichroic dye, having a first polarization axis and a polarization efficiency of greater than or equal to about 90%; and
a second polarizing filter comprising at least another dichroic dye, having a second polarization axis and a polarization efficiency of between about 10% and about 99%, wherein the polarization axis of the second polarizing filter is positioned orthogonally relative to the polarization axis of the first polarizing filter such that the optical article has a transmission factor between 400 nm and 450 nm of less than 1% and above 10% from 500 nm to 700 nm.

2. The optical article of claim 1 , wherein the first polarizing filter has a polarizing efficiency of about 99% or greater.

3. The optical article of claim 1 , wherein the second polarizing filter has a polarizing efficiency of about 99% or greater in one or more of the following wavelength range of from about 400 nm to about 450 nm, 470 nm to 500 nm, 570 nm to 600 nm.

4. The optical article of claim 1 , wherein the first polarizing filter is a first color, and the second polarizing filter is a second color.

5. The optical article of claim 4 , wherein the first color is selected from the group consisting of: neutral, Gray, Gray-green, or brown.

6. The optical article of claim 1 , wherein the optical article has a Blue Violet Cut (BVC) value of greater than or equal to 99%.

7. The optical article of claim 1 , wherein the optical article has a Retinal Cell Apoptosis Reduction (RCAR) value of 100%.

8. The optical article of claim 1 , wherein the optical article comprises a relative light transmission factor in the visible spectrum Tv (400 nm-460 nm) of less than 5%.

9. The optical article of claim 1 , wherein the optical article comprises a relative light transmission factor in the visible spectrum Tv (470 nm-500 nm) of less than 10%.

10. The optical article of claim 1 , wherein the optical article comprises a relative light transmission factor in the visible spectrum Tv (470 nm-500 nm and 570 nm-600 nm) of less than 10%.

11. The optical article of claim 1 , wherein the optical article is an ophthalmic lens.

Assignees

• Essilor Int

Inventors

• Balasubramanian Srinivasan
• Jallouli Aref

Classifications

• G02C7/12 Primary

  Polarisers · CPC title

• G02C7/104

  having spectral characteristics for purposes other than sun-protection · CPC title